IMPROVEMENTS IN OR RELATING TO ELECTROSTATIC COATING OF SUBSTRATES OF MEDICINALPRODUCTS

摘要

A method of coating substrates of medicinal products with a dry powder includes the following steps: feeding the medicinal substrates onto a conveying means (1); supplying the dry powder to a region (5) through which the substrates are to be conveyed; conveying the medicinal substrates on the conveying means (1) through the region (5) with the conveying means and/or the substrates maintained at a different electric potential from the dry powder, whereby the dry powder is attracted to the exposed surfaces of the substrates but is unable to reach the coated surfaces of the substrates in contact with the conveying means, and treating the dry powder coatings to convert the powder into a fused film secured to the substrates.